Masuzushi

Masuzushi (ますずし or 鱒寿司) is a type of pressed sushi (oshi-zushi) originating from Toyama Prefecture, Japan. It is made by packing salted trout (masu) and vinegared rice into a round wooden container made of cedar or bamboo called a masu. The fish is typically thinly sliced and arranged decoratively over the rice. The entire package is then pressed to create a firm, compact sushi.

Masuzushi is a popular ekiben (train station bento box) in Toyama and is often sold as a souvenir. Its distinctive flavor comes from the combination of the slightly sour rice, the savory trout, and the subtle aroma of the wooden container. The preparation method and exact taste can vary between different producers in the region, creating a diversity of masuzushi offerings.

Traditionally, masuzushi was made using cherry trout (sakura masu), a type of trout native to the rivers of Japan. However, due to changes in fish availability and cost, other types of trout are now often used.